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(No Model.) 2 Sheets-Sheet I,

J. G. HENDERSON. GOVERNOR.

No. 487,265. Patented Dec. 6, 1892.

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(No Model.) 2 Shets-Sheet 2.

J. O. HENDERSON. GOVERNOR.

No. 487,265. Patented Dec. 6, 1892.

WW mm gvw ewtoz whit/la UNITED STATES PATENT ()FFICE.

JOHN C. HENDERSON, OF NEW YORK, N. Y.

GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 487,265, dated December 6, 1892.

Application filed April 24, 1891. Serial No. 390,266. (No model.)

To all whom it may concern.-

Be it known that I, JOHN C. HENDERSON, a citizen of the United States, residing at New York city, county and State of New York, have invented a certain new and useful Improvement in Centrifugal Governors, of which the following is a specification.

The present invention relates to centrifugal governors of the class adapted to be mounted on and to be turned by a shaft of the motor or engine to be regulated and by means of suitable intermediate devices to open or close the valves regulating the supply of the fluid to the motor in accordance with the speed of the engine; and it consists in certain features of construction and in certain combinations hereinafter fully set forth and claimed.

In the accompanying drawings, illustrating the improved governor, Figure 1 is a side view thereof, looking from the left of Fig. 3. Fig. 2 is a similar View, looking from the right of Fig. 3. Fig. 3 is a side view of the governor, a portion of the rim being broken away and one or two parts being omitted to avoid confusion; and Fig.4 is a side view of one of the eccentrics.

The governor to be described is duplexthat is, has means for controlling two separate valves. The main body or frame of the governor consists of two semicircular disks or plates 1 1, having flanges 2 2 on both sides, said flanges forming a continuous rim when the two plates are secured together, as indicated in Fig. 1, on the shaft 3.

4 are bolts for securing the plates together.

5 is a spline for connecting the governor to the shaft, so that it will turn with it.

At the center of the governor and on each side of the central partition formed by plates 1 are eccentrics 6 7. These eccentrics are made in halves, secured together by bolts 6', and

have holes 8, through which the shaft passes loosely, as shown. The eccentric 6 is pivoted at 9 to plate 1. On the opposite side is an extension 10, which is connected with the piston-rod 11 of the dash-pot 12. This dash-pot piston and at 16 communicating with the interior of the cylinder on the other side of the piston.

17 is a screw, which may be turned in more or less to regulate the size of the passage, and hence the time required for forcing the oil on one side of the piston through said passage to the other side of the piston, as will be evident.

The eccentric 7 is pivoted at 18. This eccentric has no extension corresponding to 10 of Fig. 1, since is not connected to a dash-pot, one dash-pot being found sufficient to control both parts of the duplexgovernor.

19 in Fig. 1 are arms connected at one end to eccentric 6 by bolts 20 and at the opposite ends to levers 21, pivoted at 22. Connected with the same pivot-shaft are arms 23, carrying at their outer ends weights 24 24', each weight being provided with an adjustable spring 25, which can be made to counteract the centrifugal force of the weights to any desired extent. These springs are omitted in Fig. 3. The lever 21 at the right in Fig. 1 is connected by an arm 26 to an arm 27, which is connected to a pivot-shaft 28, extending through the plate 1 and beyond it to form a bearing for a corresponding arm on the other side of the governor. The weights and springs in Fig. 2 are numbered as in Fig. 1. The lower weight is carried by an arm 29,pivoted at 30. 31 is an arm rigidly connected to the same pivot and is connected by arm 32 and bolt 33 to the eccentric 7. A similar bolt and arm connect the eccentric with arm 34 on the pivot-shaft 28, before referred to.

On each of the eccentrics is placed a strap 35, having a rod 36 connected directly or indirectly through a cross-head and valve-rod to a valve controlling admission of fluid to the engine. This arrangement being well known, it is not shown in full herein.

The strap and connecting-rod are omitted from the eccentric 7 in Fig. 3. Instead of the strap and rod other suitable device for reciprocating the valve may be used.

It will be understood that if only one valve is to be controlled the devices on one side of the governor may be omitted; but the governor above described is designed particularly as a duplex governor-that is,one which simultaneously controls two valvesfor ex* ample, the valves of the high-pressure and intermediate-pressure cylinders in a triple expansion engine, the eccentric at the left in Fig. 3, with its connecting-rod, controlling the first valve, and the eccentric, with its rod, on the other side controlling the second valve.

The operation is as follows: When the shaft 3 rotates in the direction of the large arrow, Fig. 1, carrying with it the governor, the

weights 24 tend to move in the direction of the arrows placed thereon, and through the arm 19 to move the eccentric 6 toward the left on its pivot 9, thus varying the length of the stroke of rod 36, connected to the strap 35 in a well-known manner. At the same time the weights 24 on the opposite side of of the partition tend to move in the direction of the arrows placed thereon and to move the eccentric 7 on its pivot 18. Since the pivotshaft 28 is common to both sets of weights and levers, the two valvecontrolling devices will be operated in unison, and a single retarding device only will be required.

The governor described is easily made and put in place and is not liable to get out of order.

What I claim is 1. The combination, in a governor, of a frame or disk secured or adapted to be secured to a shaft, an eccentric on one side of the frame or disk, having arms, one of which is pivoted to the frame, a dash-pot mounted on the frame and having a piston connected to another arm of the eccentric, an eccentric on the opposite side of the frame or disk, having an arm pivoted to said frame or disk, but without the dash-pot arm, weights on both sides of the frame or disk and carried by arms pivoted to the frame, means for transferring motion from said weights to the eccentrics, and springs opposing movement of the weights under centrifugal action, substantially as described.

2. The combination, in a governor, of a sectional frame or disk secured or adapted to be secured to a shaft, an eccentric on one side of the frame or disk, having arms 9 10, the former being pivoted to the frame, a dash-pot mounted on the frame and having a piston connected to the other arm of the eccentric, an eccentric on the opposite side of the frame or disk, having an arm pivoted to said frame or disk, but without the dash-pot arm, weights on both sides of the frame or disk and carried by arms pivoted to the frame, means for transferring motion from said weights to the eccentrics, and springs opposing movement ofthe weights under centrifugal action, substantially as described.

This specification signed and witnessed this 21st day of April, 1891.

JOHN C. HENDERSON. Witnesses:

J. H. GIBSON, W. E. BUNDLE. 

